Always listen to both sides. Always always, Some call the Bible the book of life, and there is valid reason for this.
To be a good judge, you always have to listen to both sides of a story at all times.
If you are at least an occasional church goer, you should have at one time or the other come across the story of Solomon and the two women who claimed a baby, and Solomon had the difficult task of finding out who the true mother of the kid was, and we all know just how he resolved that issue.
As the Anglicans will say, "This Law hangs all the laws and the prophets"...lol
The Law is a simple but rather underrated one.